0_0_1223790_5706.cpp: In function `int main()':
0_0_1223790_5706.cpp:17: error: `strrev' undeclared (first use this function)
0_0_1223790_5706.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1223790_5706.cpp:25: error: expected `}' at end of input
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